1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
// *****************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: https://www.gnu.org/licenses/gpl-3.0 *
// * Copyright (C) Zenju (zenju AT freefilesync DOT org) - All Rights Reserved *
// *****************************************************************************
#ifndef FILE_ACCESS_H_8017341345614857
#define FILE_ACCESS_H_8017341345614857
#include <functional>
#include "file_path.h"
#include "file_error.h"
#include "serialize.h" //IoCallback
#include <sys/stat.h>
namespace zen
{
//note: certain functions require COM initialization! (vista_file_op.h)
//POSITIVE existence checks; if false: 1. item not existing 2. different type 3.device access error or similar
bool fileAvailable(const Zstring& filePath); //noexcept
bool dirAvailable (const Zstring& dirPath ); //
//FAT/FAT32: "Why does the timestamp of a file *increase* by up to 2 seconds when I copy it to a USB thumb drive?"
const int FAT_FILE_TIME_PRECISION_SEC = 2; //https://devblogs.microsoft.com/oldnewthing/?p=83
//https://web.archive.org/web/20141127143832/http://support.microsoft.com/kb/127830
using FileIndex = ino_t;
using FileTimeNative = timespec;
inline time_t nativeFileTimeToTimeT(const timespec& ft) { return ft.tv_sec; } //follow Windows Explorer: always round down!
inline timespec timetToNativeFileTime(time_t utcTime) { return {.tv_sec = utcTime}; }
enum class ItemType
{
file,
folder,
symlink,
};
//(hopefully) fast: does not distinguish between error/not existing
ItemType getItemType(const Zstring& itemPath); //throw FileError
//execute potentially SLOW folder traversal but distinguish error/not existing:
// - all child item path parts must correspond to folder traversal
// => we can conclude whether an item is *not* existing anymore by doing a *case-sensitive* name search => potentially SLOW!
std::optional<ItemType> itemStillExists(const Zstring& itemPath); //throw FileError
enum class ProcSymlink
{
asLink,
follow
};
void setFileTime(const Zstring& filePath, time_t modTime, ProcSymlink procSl); //throw FileError
int64_t getFreeDiskSpace(const Zstring& folderPath); //throw FileError, returns < 0 if not available
//- symlink handling: follow
//- returns < 0 if not available
//- folderPath does not need to exist (yet)
//symlink handling: follow
uint64_t getFileSize(const Zstring& filePath); //throw FileError
//get per-user directory designated for temporary files:
Zstring getTempFolderPath(); //throw FileError
void removeFilePlain (const Zstring& filePath); //throw FileError; ERROR if not existing
void removeSymlinkPlain (const Zstring& linkPath); //throw FileError; ERROR if not existing
void removeDirectoryPlain(const Zstring& dirPath ); //throw FileError; ERROR if not existing
void removeDirectoryPlainRecursion(const Zstring& dirPath); //throw FileError; ERROR if not existing
void moveAndRenameItem(const Zstring& pathFrom, const Zstring& pathTo, bool replaceExisting); //throw FileError, ErrorMoveUnsupported, ErrorTargetExisting
bool supportsPermissions(const Zstring& dirPath); //throw FileError, follows symlinks
//copy permissions for files, directories or symbolic links: requires admin rights
void copyItemPermissions(const Zstring& sourcePath, const Zstring& targetPath, ProcSymlink procSl); //throw FileError
void createDirectory(const Zstring& dirPath); //throw FileError, ErrorTargetExisting
//creates directories recursively if not existing
void createDirectoryIfMissingRecursion(const Zstring& dirPath); //throw FileError
//symlink handling: follow
//expects existing source/target directories
//reports "note-worthy" errors only
void tryCopyDirectoryAttributes(const Zstring& sourcePath, const Zstring& targetPath); //throw FileError
void copySymlink(const Zstring& sourcePath, const Zstring& targetPath); //throw FileError
struct FileCopyResult
{
uint64_t fileSize = 0;
FileTimeNative sourceModTime = {};
FileIndex sourceFileIdx = 0;
FileIndex targetFileIdx = 0;
std::optional<FileError> errorModTime; //failure to set modification time
};
FileCopyResult copyNewFile(const Zstring& sourceFile, const Zstring& targetFile, //throw FileError, ErrorTargetExisting, ErrorFileLocked, X
//accummulated delta != file size! consider ADS, sparse, compressed files
const IoCallback& notifyUnbufferedIO /*throw X*/);
}
#endif //FILE_ACCESS_H_8017341345614857
|
